From cf2eedb85bac17f0507777025b608ed8634fae8e Mon Sep 17 00:00:00 2001
From: GRayHook <s@marinkevich.ru>
Date: Wed, 17 Jun 2026 12:01:36 +0700
Subject: [PATCH] =?UTF-8?q?Phase=208:=20add=20compaction=20runtime=20state?=
 =?UTF-8?q?=20=E2=80=94=20pendingCompactionSource=20container=20for=20?=
 =?UTF-8?q?=C2=A78.?=
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Transient CompactionRuntime holds pending source between input, before_compact, and session_compact hooks.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 src/compaction.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 src/compaction.ts

diff --git a/src/compaction.ts b/src/compaction.ts
new file mode 100644
index 0000000..6bf2ff4
--- /dev/null
+++ b/src/compaction.ts
@@ -0,0 +1,12 @@
+import type { CompactionSource } from "./state.js";
+
+/** Runtime compaction-source detection between input → before_compact → session_compact (SPEC §8). */
+export interface CompactionRuntime {
+	pendingCompactionSource: CompactionSource | null;
+}
+
+export function createCompactionRuntime(): CompactionRuntime {
+	return {
+		pendingCompactionSource: null,
+	};
+}